Chunshu No. 5 (Potato)

This variety is a new dual-purpose potato variety bred by Jilin Institute of vegetable and Flower Science with Chunshu 2 as female parent and Ke S2-14-1-12-3-(9) as male parent.

Characteristic Chunshu No. 5 has 90-100-day growth days, plant type diffusion, strong growth potential, plant height 50-60 cm, stout stem, triangular type, straight stem wing, few branches, large leaves, yellowish green, white flowers, short stigma, easy to drop buds. The tubers are concentrated, the tubers are flat and round, and the rate of commercial potatoes is high. White potato skin, hemp skin, thin and shallow bud eyes, white potato meat. This variety likes fertilizer and water and has great potential to increase production. Participated in the regional test of Jilin Province from 1993 to 1994, the average yield per mu was 2066.4 kg, 6.67% higher than that of the control 303, and participated in the production test from 1995 to 1996. The average yield per mu was 1569.4 thousand / mu, 11.15% higher than that of the control 303. The general yield per mu is 15002000 kg, with a maximum of more than 2500 kg.

This variety has excellent steaming quality and good processing quality. After determination, dry matter content 22.54%, starch content 14.7%-16.0%, reducing sugar 0.18%-0.22%, vitamin C content 13.3-14.7 mg / 100 g fresh weight, fried potato chips color 1.5-2.0 grade, colorimeter determination 62.75 points, potato chips taste crisp. Chunshu No. 5 was resistant to late blight in the field, and the rate of rotten potato was low. It is allergic and resistant to PVY virus and is easy to be infected with Okubu mosaic virus. It is sensitive to light and can delay the birth days under the condition of long sunshine.

Cultivator Jilin Institute of vegetable and Flower Science

Region and technology this variety is suitable for planting in Jilin, Liaoning, Hebei, Shandong, Jiangsu, Zhejiang, Guizhou and eastern Inner Mongolia, and has been popularized and planted in a total of 40,000 mu. It is estimated that the annual extension area of the suitable area can reach 1.28 million mu.

Cultivation rules:

1. The seed potato came out of the cellar one month before sowing, and the seed potato was stacked in 2 layers under scattered light to accelerate budding. during the period of germination, the seed potato was turned twice, and the bud length was 1.5 cm and 2.0 cm.

two。 Apply more than 3000 kg of acidic organic fertilizer per mu, mix diammonium phosphate and potassium sulfate 8-10 kg each, and then apply seed fertilizer.

3. Sowing date when the soil temperature at 10 cm reaches 7: 8 ℃, the suitable sowing time in Jilin Province is the middle of April.

4. The density of each seed block is more than 30 grams, cut into single bud three-dimensional blocks, row spacing 60 cm, plant spacing 20-25 cm, about 5000 seedlings per mu.

5. Promote early cultivation of plastic film mulching: sowing in the middle of April, soil preparation should be fine, loose and flat, soil moisture should be better, and plastic film mulching should be done after sowing. Seedlings should be introduced and sealed in time after emergence. Seedling raising and planting: cut into pieces in the first and middle of April and carry out in hotbeds, greenhouses or small arch sheds. The seed blocks are laid flat on one layer and covered with fine soil or nutrient soil with a water content of 70% to 80%. When the top soil of the seedlings was watered once, the seedlings were planted in water with a height of 10 cm and 15 cm in early May, with a thickness of 8 cm and 10 cm, and then covered with film, introduced and sealed.

6. Shovel once before seedling emergence in field management, which is beneficial to kill weeds and improve soil temperature. Shovel the weeds in the field once at bud stage and cultivate soil at flowering stage. In case of high temperature and drought during the flowering period, irrigation should be made in time to facilitate the normal growth of tubers.